Ages of the giant mottled eel Anguilla marmorata recruited at the northern Luzon Island, the Philippines between 2009 and 2011Ages of the giant mottled eel Anguilla marmorata recruited at the northern Luzon Island, the Philippines between 2009 and 2011AA11957899

To accumulate information on the larval transportation of the freshwater eels in the North Pacific, we examined the ages of the giant mottled eel Anguilla marmorata recruited at the northern Philippines. The glass eel specimens analyzed were collected at the river mouth of the Cagayan River in the Luzon Island in January 2009, November 2011 and November 2012, and the daily increment rings of the otoliths were observed to determine the ages at recruitment (n=14). There was no significant difference in the ages at recruitment among the 2009- (147.0 ± 24.4 days; 126–182), 2011- (145.2 ± 17.3; 122–161) and 2012-groups (136.0 ± 11.1; 122–145), and were in the range of those in the previous studies at the same place. Further efforts to accumulate information on the ages at recruitment at various localities and timings will be important to comprehensively understand the early life history of A. marmorata in the North Pacific.